Standard name

Memory clock

(MHz)

Cycle time

(ns)

I/O bus clock

(MHz)

Data rate

(MT/s)

Module name

Peak transfer rate

(MB/s)

Timings^[2][3]

(CL-tRCD-tRP)

CAS latency

(ns)

DDR2-400B
DDR2-400C

100

10

200

400

PC2-3200

3200

3-3-3
4-4-4

15  
20  

DDR2-533B
DDR2-533C

133⅓

7½

266⅔

533⅓

PC2-4200*

4266⅔

3-3-3
4-4-4

11¼
15  

DDR2-667C
DDR2-667D

166⅔

6

333⅓

666⅔

PC2-5300*

5333⅓

4-4-4
5-5-5

12  
15  

DDR2-800C
DDR2-800D
DDR2-800E

200

5

400

800

PC2-6400

6400

4-4-4
5-5-5
6-6-6

10  
12½
15  

DDR2-1066E
DDR2-1066F

266⅔

3¾

533⅓

1066⅔

PC2-8500*

8533⅓

6-6-6
7-7-7

11¼
13⅛